CN110806366A - Online massecuite fluidity change detection instrument and detection method for sugar refinery - Google Patents

Abstract

The invention discloses a sugar factory online massecuite fluidity change detection instrument and a detection method, comprising a shaft seal mounting plate, a bearing mounting plate and a motor mounting plate. The shaft seal mounting plate and the bearing mounting plate are respectively provided with a shaft seal assembly and a The bearing assembly, the rear end of the motor mounting plate is installed with a stepper motor connected to the control host through a signal cable, the shaft seal assembly and the bearing assembly are coaxially installed with a rotating shaft, and the front end of the rotating shaft is installed with one or more propellers, rotating The rear end of the shaft is connected to the output shaft of the stepper motor through the coupling set between the bearing mounting plate and the motor mounting plate; the front shaft seal mounting plate is sealed and butted with the detector adapter on the crystallizing tank with a quick-release clamp. Extend the propeller into the crystallizing tank. In the present invention, the current or voltage of the stepping motor is detected by a massecuite fluidity change detector, and the current or voltage in air and water is compared and calculated to realize the real-time detection of the online massecuite fluidity change.

Description

Sugar factory online massecuite fluidity change detection instrument and detection method

technical field

The invention relates to a technology for detecting the production process of boiled sugar, in particular to an on-line massecuite fluidity change detection instrument and a detection method in a sugar factory.

Background technique

In the existing sugar boiling process in domestic sugar factories, the flow effect of massecuite will directly affect the crystallization environment and crystal growth rate. Dynamic crystallization is much faster than static crystallization. The paste is maintained at the required degree of supersaturation, and the crystals in it are moved by the flow of the mother liquor, so that the sugar liquor can be convectively circulated in the crystallization tank to achieve the purpose of sugar extraction.

The convection of massecuite in the crystallizing tank has a great relationship with the effect of cooking sugar:

1. The massecuite has good convection, and the water evaporates quickly, which shortens the sugar cooking time, increases the material handling capacity, and reduces the sucrose conversion loss and the increase of pigments in the sugar cooking process.

2. Poor circulation of massecuite will cause various problems such as dissolved sugar, sticky crystals, pseudocrystals, coking and prolonged cooking time.

3. The convection of the massecuite is too fast, and it is also easy to cause sugar.

In the process of cooking sugar, the fluidity change of massecuite is mainly observed and checked through the sugar inspection glass by the operator's sampling inspection method. Due to the different experience of each operator, there are certain differences in the results of observation and inspection; in addition, during the process of boiling sugar and crystallizing, it is necessary to repeatedly check the fluidity of massecuite according to different stages, and the massecuite is extracted from the sampling rod of the crystallization tank. For the groove type, whenever the operator observes and inspects the change of fluidity, it is necessary to pull and draw the sampling rod for sampling several times to obtain a relatively average inspection result, which greatly increases the labor intensity of the operator.

SUMMARY OF THE INVENTION

Aiming at the deficiencies of the prior art, the technical problem to be solved by the present invention is to provide an instrument and a detection method for replacing artificial on-line massecuite fluidity change detection in a sugar factory.

An on-line massecuite fluidity change detection instrument in a sugar factory that can solve the above technical problems, the technical scheme includes front, middle and rear coaxial shaft seal mounting plates, bearing mounting plates and motor mounting plates, the shaft seal mounting plate and the bearing A shaft seal assembly and a bearing assembly are coaxially arranged on the installation plate, a stepper motor connected to the control host through a signal cable is installed at the rear end of the motor installation plate, and a rotating shaft is installed on the shaft seal assembly and the bearing assembly coaxially. The front end of the rotating shaft is installed with one or more propellers, and the rear end of the rotating shaft is connected to the output shaft of the stepping motor through a coupling provided between the bearing mounting plate and the motor mounting plate.

Further, the front shaft seal mounting plate, the bearing mounting plate and the motor mounting plate are mounted and connected by supporting rods distributed evenly around the circumference of the plate body.

Further, the bearing mounting plate, the motor mounting plate and the stepping motor are arranged in the housing.

Adopt the detection method of the sugar factory online massecuite fluidity change detection instrument of the present invention, including installation mode and detection mode, wherein:

1. The installation method adopts a detector adapter. The detector adapter is sealed and welded on the crystallization tank of the massecuite. The front shaft seal mounting plate is sealed and connected to the detector adapter with a quick-release clamp. The propeller extends into the crystallizing tank through the detector adapter.

2. The detection method includes the following program steps:

①. Before the detector is installed on the crystallizing tank, let the rotating shaft of the detector idle, control the host to continuously detect the voltage or current value of the stepper motor for 1 to 5 minutes and calculate the average value, and control the host to idle The average is recorded as a base for detection.

②. Then put the propeller on the rotating shaft into the clean water, the stepper motor drives the propeller to push the clean water, and the control host continuously detects the voltage value or current value of the stepper motor for 1 to 5 minutes (the time has been set during idling) and The average value is calculated, and the control panel records the average value as another base for detection.

3. Finally, install the detector on the crystallizing tank, the stepper motor drives the propeller to rotate, and the control host continuously detects the voltage value or current value of the stepper motor online. When the propeller pushes the massecuite, the voltage value or current value of the stepper motor It will increase or decrease with the change of the fluidity of the massecuite. According to the detected voltage value or current value of the stepper motor and the average value of idling and running in clean water, the current massecuite is calculated by comparing and calculating. Viscosity and fluidity coefficient of clean water.

Beneficial effects of the present invention:

The present invention uses a massecuite fluidity change detector to detect the current or voltage of the stepping motor, and compares and calculates the current or voltage in air and water, so as to realize the real-time online detection of the fluidity change of the massecuite.

Description of drawings

FIG. 1 is an axonometric view of an embodiment of the present invention.

Drawing number identification: 1, support rod; 2, shaft seal mounting plate; 3, bearing mounting plate; 4, motor mounting plate; 5, shaft seal assembly; 6, bearing assembly; 7, stepping motor; 8, rotating shaft; 9. Propeller; 10. Coupling; 11. Cover; 12. Detector adapter; 13. Quick-install clamp; 14. Signal cable.

Detailed ways

The technical solutions of the present invention will be further described below with reference to the embodiments shown in the accompanying drawings.

The on-line massecuite fluidity change detection instrument of the sugar factory of the present invention includes a rotating shaft 8 , a shaft seal mounting plate 2 , a bearing mounting plate 3 , a motor mounting plate 4 and a stepping motor 7 that are assembled into one.

The shaft seal mounting plate 2 (circular plate), the bearing mounting plate 3 (circular plate), the motor mounting plate 4 (circular plate) are arranged coaxially in the order of front, middle and rear, and the shaft seal mounting plate 2 and the bearing mounting plate 3 The three motor mounting plates 4 are fixedly installed by four support rods 1 that are evenly distributed around the respective plates, the shaft seal mounting plate 2 is installed with a shaft seal assembly 5 in the center, and the bearing mounting plate 3 is installed in the center of the bearing assembly 6. , the stepping motor 7 is mounted on the rear end of the motor mounting plate 4, and the output shaft of the stepping motor 7 passes through the motor mounting plate 4 forward to connect the coupling 10 (coaxially arranged on the bearing mounting plate 3 and the motor mounting plate the rear end of the rotating shaft 8, the shaft body of the rotating shaft 8 is coaxially mounted on the shaft seal assembly 5 and the bearing assembly 6, the front end of the rotating shaft 8 is installed with the propeller 9 in the front and the rear, and the rear end of the rotating shaft 8 Connected with the front end of the coupling 10; the bearing mounting plate 3, the motor mounting plate 4 and the stepping motor 7 are arranged in the casing 11, and the signal cable 14 on the stepping motor 7 passes out of the casing 11 to connect to the control host ,As shown in Figure 1.

The installation method of the sugar factory on-line massecuite fluidity change detection instrument of the present invention on the crystallization tank of the massecuite is as follows:

A detector adapter 12 is provided, and the detector adapter 12 is a connecting sleeve, and the partially enlarged nozzle at the rear end of the connecting sleeve is matched with the shaft seal mounting plate 2, and a connecting sleeve is provided on the crystallizing tank. The front end of the tube is matched with a round hole, the detector adapter 12 is sealed and welded on the crystallizing tank through the round hole, the rotating shaft 8 and the front and rear propellers 9 are inserted into the crystallizing tank through the connecting sleeve, and the shaft seal is installed. The plate 2 is docked with the rear nozzle of the connecting sleeve (a sealing ring is provided on the butting surface), and the shaft seal installation plate 2 and the connecting sleeve are fixed by the quick-install clamp 13, so as to complete the detection instrument on the crystallizing tank. installation, as shown in Figure 1.

The method for detecting the fluidity of massecuite by adopting the on-line massecuite fluidity change detection instrument of the sugar factory of the present invention comprises the following scheme steps:

1. Before the detection instrument is installed in the crystallizing tank, the control host outputs a drive signal, the stepping motor 7 drives the rotating shaft 8 and the two propellers 9 to rotate in the air, and the control host continuously controls the voltage value of the stepping motor 7 (using a constant current) When driving a stepper motor) or current value (when using a constant voltage to drive a stepper motor), detect 1 minute to 5 minutes (can be set by the control host) and calculate the average value, and the control host will record the idling average value as a basis for detection.

2. Then extend the rotating shaft 8 and the two propellers 9 into the clean water together, control the host to output the drive signal, the stepper motor 11 drives the two propellers 9 to push (forward or backward) the clean water, and control the host to continuously respond to the stepper motor. The voltage value or current value of 7 is detected for 1 minute to 5 minutes (the time has been set at idling) and the average value is calculated, and the control host records the average value as another basis for detection.

3. During on-site detection (that is, the detection instrument is installed on the crystallizing tank), the control host outputs a drive signal, the stepping motor 7 drives the rotating shaft 8 and the two propellers 9 to rotate, and the control host starts to continuously detect the voltage value of the stepping motor 7 online. Or the current value, when there is massecuite in the crystallizing tank, because the massecuite has a certain viscosity and flow resistance, when the stepping motor 7 drives the two propellers 9 to push (forward or backward) the massecuite, the voltage of the stepping motor 7 is The value or current value will increase or decrease with the change of the fluidity of the massecuite. The control host compares and calculates the detected voltage value or current value of the stepping motor 7 and the average value of idling and running in clean water. , so as to calculate the viscosity and fluidity coefficient of the current massecuite relative to clear water.

The current voltage value or current value of the stepper motor 7, the water viscosity multiple and the fluidity coefficient, etc. can be displayed on the control host, and the sugar cooking operator can use these data as a reference to perform the corresponding operation of the sugar cooking.

Claims (3)

1. On-line massecuite fluidity change detecting instrument of sugar refinery, its characterized in that: including preceding, well, coaxial bearing seal mounting panel (2) in back, bearing mounting panel (3) and motor mounting panel (4), coaxial bearing seal subassembly (5) and bearing assembly (6) of being equipped with respectively on bearing seal mounting panel (2) and the bearing mounting panel (3), step motor (7) of passing through signal cable (14) connection control host computer are installed to motor mounting panel (4) rear end, coaxial arrangement has axis of rotation (8) on bearing seal subassembly (5) and the bearing assembly (6), screw (9) more than one or two are installed to the front end of axis of rotation (8), and the output shaft of step motor (7) is connected through shaft coupling (10) of locating between bearing mounting panel (3) and motor mounting panel (4) to the rear end of axis of rotation (8).

2. The on-line massecuite fluidity change detecting instrument in a sugar refinery according to claim 1, characterized in that: the front shaft seal mounting plate (2), the bearing mounting plate (3) and the motor mounting plate (4) are connected through supporting rods (1) which are uniformly distributed on the plate body in the circumferential direction.

3. The on-line massecuite fluidity change detecting instrument in a sugar refinery according to claim 2, characterized in that: the bearing mounting plate (3), the motor mounting plate (4) and the stepping motor (7) are arranged in the housing (11).

The online sugar mass fluidity change detection method for the sugar refinery is characterized by adopting the online sugar mass fluidity change detection instrument for the sugar refinery as claimed in any one of claims 1 to 3, and comprising an installation mode and a detection mode, wherein:

①, the installation mode adopts a detector adapter (12), the detector adapter (12) is welded on a crystallizing tank of massecuite in a sealing way, a fast-assembling clamp (13) is used for butt-jointing the front shaft seal installation plate (2) with the detector adapter (12) in a sealing way, and the rotating shaft (8) and the propeller (9) thereon extend into the crystallizing tank through the detector adapter (12);

②, the detection mode comprises the following steps:

a. before the detector is installed on a crystallization tank, a rotating shaft (8) of the detector idles, a control host continuously detects the voltage value or the current value of a stepping motor (7) for 1 minute to 5 minutes (parameter setting can be carried out on the control host) and calculates an average value, and the control host records the idle average value as a base number of detection;

b. then the propeller (9) on the rotating shaft (8) is inserted into the clear water, the stepping motor (7) drives the propeller (9) to push the clear water, the control host continuously detects the voltage value or the current value of the stepping motor (7) for 1 minute to 5 minutes and calculates the average value, and the control host records the average value as another detected base number;

c. and finally, the detector is installed on a crystallizing tank, the screw propeller (9) is driven by the stepping motor (7) to rotate, the host computer is controlled to continuously detect the voltage value or the current value of the stepping motor (7) on line, when the screw propeller (9) pushes the massecuite, the voltage value or the current value of the stepping motor (7) can be increased or decreased along with the change of the fluidity of the massecuite, and the viscosity and the fluidity coefficient of the current massecuite relative to the clear water are calculated by comparing and calculating the detected voltage value or the detected current value of the stepping motor (7) with the average value of idle rotation and rotation in the clear water.

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